MODEL 4500 SERIES VIBRATING WIRE PIEZOMETER
| TAKING READINGS |
15
5.2
GK-405 VIBRATING WIRE READOUT
The GK-405 Readout is made up of two components:
■
The Readout Unit, consisting of a Windows Mobile handheld PC running
the GK-405 Vibrating Wire Readout application.
■
The GK-405 Remote Module, which is housed in a weather-proof enclosure.
The remote module can be wire-connected to the sensor by means of:
■
Flying leads with alligator clips, if the sensor cable terminates in bare wires.
■
A 10 pin connector.
The two units communicate wirelessly using Bluetooth
®
, a reliable digital
communications protocol. Using Bluetooth, the unit can operate from the cradle
of the remote module, or, if more convenient, can be removed and operated up
to 20 meters away from the remote module.
The GK-405 displays the thermistor temperature in degrees Celsius.
For further details, consult the GK-405 Instruction Manual.
FIGURE 12:
GK-405 Readout
5.2.1 CONNECTING SENSORS WITH 10-PIN BULKHEAD CONNECTORS
ATTACHED
Align the grooves on the sensor connector (male), with the appropriate
connector on the readout (female connector, labeled senor or load cell). Push
the connector into place, and then twist the outer ring of the male connector
until it locks into place.
5.2.2 CONNECTING SENSORS WITH BARE LEADS
Attach the flying leads to the bare leads of a
GEOKON
vibrating wire sensor by
connecting each of the clips on the leads to the matching colors of the sensor
conductors, with blue representing the shield (bare).
5.2.3 OPERATING THE GK-405
Press the power button on the Readout Unit. After start-up completes, a blue
light will begin flashing, signifying that the two components are ready to
connect wirelessly. Launch the GK-405 VWRA program by doing the following:
1.
Tap Start on the hand-held PC's main window.
2.
Select Programs.
3.
Tap the GK-405 VWRA icon.
After a few seconds, the blue light should stop flashing and remain lit. The Live
Readings window will display on the hand-held PC.
Set the Display mode to the correct letter required by your equipment. For more
information, consult the GK-405 Instruction Manual.
5.3
MEASURING TEMPERATURES
All
GEOKON
vibrating wire instruments are equipped with a thermistor for
reading temperature. The thermistor gives a varying resistance output as the
temperature changes. The white and green leads of the instrument cable are
normally connected to the internal thermistor.
The GK-404 and GK-405 readouts will read the thermistor and display the
temperature in degrees Celsius.
